Dealing with negotiations

I’m coming to a point where I’m dealing with negotiations with two suppliers,

1. one supplier talked to me early, and even sent me a design file, is very professional and patient, but, is sending me a higher quote 3.2$ per peice

2. The second supplier acts quick, hastily, asking me if I’ve approved a sample price quote, talks more casually, but is offering me a 2.88$ per peice

My questions are :

1. When negotiating with supplier 1, should I send a listing of quote sent by my supplier 2 and try negotiating

2. If not 1, how should I negotiate

3. Is supplier 2, something you’ve faced? How did you negotiate?